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CRYSTAL STRUCTURE OF SMAD2 MH2 DOMAIN BOUND TO THE SMAD-BINDING DOMAIN OF SARA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis of Smad2 recognition by the Smad anchor for receptor activation.

Wu, G.Chen, Y.G.Ozdamar, B.Gyuricza, C.A.Chong, P.A.Wrana, J.L.Massague, J.Shi, Y.

(2000) Science 287: 92-97


  • PubMed Abstract: 
  • The Smad proteins mediate transforming growth factor-beta (TGFbeta) signaling from the transmembrane serine-threonine receptor kinases to the nucleus. The Smad anchor for receptor activation (SARA) recruits Smad2 to the TGFbeta receptors for phosphor ...

    The Smad proteins mediate transforming growth factor-beta (TGFbeta) signaling from the transmembrane serine-threonine receptor kinases to the nucleus. The Smad anchor for receptor activation (SARA) recruits Smad2 to the TGFbeta receptors for phosphorylation. The crystal structure of a Smad2 MH2 domain in complex with the Smad-binding domain (SBD) of SARA has been determined at 2.2 angstrom resolution. SARA SBD, in an extended conformation comprising a rigid coil, an alpha helix, and a beta strand, interacts with the beta sheet and the three-helix bundle of Smad2. Recognition between the SARA rigid coil and the Smad2 beta sheet is essential for specificity, whereas interactions between the SARA beta strand and the Smad2 three-helix bundle contribute significantly to binding affinity. Comparison of the structures between Smad2 and a comediator Smad suggests a model for how receptor-regulated Smads are recognized by the type I receptors.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Princeton, NJ 08544, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAD (mothers against decapentaplegic, Drosophila) homolog 2
A, C
196Homo sapiensMutation(s): 0 
Gene Names: SMAD2 (MADH2, MADR2)
Find proteins for Q15796 (Homo sapiens)
Go to Gene View: SMAD2
Go to UniProtKB:  Q15796
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Smad anchor for receptor activation
B, D
41Homo sapiensMutation(s): 0 
Gene Names: ZFYVE9 (MADHIP, SARA, SMADIP)
Find proteins for O95405 (Homo sapiens)
Go to Gene View: ZFYVE9
Go to UniProtKB:  O95405
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.218 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 138.500α = 90.00
b = 138.500β = 90.00
c = 55.900γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
DENZOdata reduction
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1999-11-15 
  • Released Date: 2000-01-21 
  • Deposition Author(s): Shi, Y., Wu, G.

Revision History 

  • Version 1.0: 2000-01-21
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Experimental preparation